Wood-trimmer.



A. S. BLLINGS.

wooo TRIMMEH.

APPLICATION FILED JULYI3, i914.

. l 3"?453 e Patented Apr. 2'?, E915.

2 SHEETS-SHEET i.

THE NORRISvPETERS COA. PHOTO-LITHG.. WASHINGTON. D. c.

A. s. BILLINGS.

woon mlmme. APPLICATION FlLED IULYKS. 1914- 1,137,453 Patented M1127, 1915.

2 SHEETS-SHEET 2- W il/mmv@ THE ORRIS PETERS CO.. PHOTD-LITHO.. WASHINGTON, D. C.

ARTHUR S. BILLINGS, OF NORTH VANCOUVER, BRTISH COLUMBIA, CANADA.

WOOD-TRIVIIVIER.

Specification of Letters Eatent.

Patented Apr. 27, 1915.

Application led July 13, 1914. Serial No. 850,771.

T0 all whom t may concern:

Be it known that l, ARTHUR S. BILLINGs, a citizen of the Dominion of Canada, residing at North Vancouver, in the Province of British Columbia, Canada, have invented certain new and useful improvements in Wood-Trimmers, of which the following is a specification.

rlhis invention relates to a wood trimmer of that class which is used to cut the ends of stock to any convenient angle by a slidable knife operated by a lever.

lt is intended for builders use to trim the ends of wood work where they fit together.

The trimmer, which is the subject of this application, is designed to be mounted on a trestle or bench and afford an ample bearing for the stock against which it may be held during the cut. A trimming knife is provided at each end of the base frame, which knife is slidable within an open frame slideway having provision for angling it in relation to the fence against which the work is held. Provision is made for the adjustment of the pivots of the slideway that the knives may cut true to the axis on which their slideway frames are angled. The device is designed throughout to enable satisfactory work to be done on it.

The invention comprises various subsidiary features of design to which attention will be drawn in the following specification, which specification fully describes the device, reference being made to the drawings by which it 'is accompanied, in which:

Figure 1 is an elevation looking on the face of the fence, one end knife and its angling slideway being removed. Fig. 2 is a plan of the same. Fig. 3 is an end elevation looking on the knife frame and its slideway. Fig. l is an enlarged detail of the adjustable stop of the frame. Fig. 5 is a sectional plan of a portion of the knife frame showing the manner of adjustment of the blade thereto, and Fig. 6 shows in perspective a supplementary provision enabling the Vdevice to be used for cutting shouldered tenons.

The device comprises a base or bed member 2 having a fence member 3 at right angles to it, which parts may be integral or secured to one another. They are of sufficient length to afford ample support for the stock, the ends of which are to be trimmed,

and are of cast iron or other suitable metal and are webbed to afford the required strength with a minimum of weight. At each end the depth of the back fence 3 is increased upward and is provided with an upper and lower bearing 4 and 5 for the reception of the pivot bearings of the open rectangular slideway 6 in which the knife holding frame is endwise movable to and from the axis of the pivot of the knife frame.

The upper surface of the bed 2 on which the stock is placed terminates at each end at an angle of forty-five degrees from the back fence 3 and the shoulder has a facing strip 8 against which the swinging slideway frame is checked at the forty-five degree angle. Below this surface of the bed plate an arc-like segment 7 endwise projects, the curve of which arc is struck from the axis of the pivot. This segment 7 affords a support for the outer ends of the swinging frame 6 and that slideway may be clamped to it at any desired angle in a manner to be described.

rihe knife frame slideway 6 rectangular frame, the upper and lower members of which have a groove at 9 for the reception of the reciprocating knife frame. To afford facility of adjustment of the axis of the pivots of the slideway to the plane of the cut of the knife, the pivots 10 are not one with the slideway but each projects from a separate member 11 which is adj ustably secured in the upper and lower side of the slideway frame 6. Each member 11 is secured by two set screws 12 which pass through apertures in the member 11 and are threaded into the frame 6. The apertures for the set screws are slightly elongated across the plane of the knife frame and on the opposite side of the pivot pin 10 a small bolt or screw 13 passes through a lug forming part of 11 and through or threaded into a lug 14. forming a part of the frame 6. By this means the screws 12 being slackened, the bolt or screw 13 may be tightened up or slackened out and the axis of each pivot pin may thus be adjusted to the cutting plane of the knife.

A knife frame 17 is endwise movable in the grooves 9 of the swinging slideway 6 and to the angled'inner end of this frame 17 a knife blade 15 of parallel width and thickness is secured by screws 16. The

is an open screws 16V pass through holes in the knife frame which are elongated in the direction of movement of the knife and are seated 1n apertures in blade 15, thus permitting adjustment of the knife blade.

The seat for the knife blade on the inner face of its frame 17, see Fig. 5, is slightly angledfrom the plane of movement of the cutting' edge of the knife so that with a blade of uniform thickness the face of the blade will have the required clearance from the plane of the cut to avoid friction of the blade on the cut `face of the wood.

The knife holding frame 17 with its blade 15 is endwise reciprocated in the slideway 6 by a gear wheel 18, the teeth of which mesh below.v with the teeth 20 of'a rack formed in the lower part of the slideway 6, and above with the teeth of a similar rack 21 downwardly projecting vfrom a web outwardly projecting from the upper part of the knife frame 17. j

The gear wheel 18 is rotated to reciprocate the knife frame bya handle lever 22, the -end of which lits with a' slightly endwise taper and edge dovetail between projections 23 formed on the outer face of the wheel. This lever is secured to the wheel by a screw 19 through its center and a retaining guard plate 24 secured to the knife frame 17 and extending along its rack 21.

The knife frame slideway 6 is secured at any desired angle on the are segment 7 of the base frame by a clamp lever 25 which is -pivotally mounted between lugs 26 downwardly projecting from the underside of the slideway frame 6 adjacent to the outer edge of the arc 7. The shorter end of this lever is shaped to engage the underside of the arc 7, and on the end of the longer arm of the lever bears the end of a rod 27, which passes rotatably through the upper part of the frame 6 and is threaded at its lower end through the lower portion of the slideway frame. The upper end is provided with a knurled head by which the screwed rod may be rotated to clamp or release the slideway frame 6 to the arc 7 of the base. Adjacent to the pivots of the swinging slideway 6 a guard member 29 projects backward from the fence member beyond the extreme movement of the knife and is similarly angled.

An adjustable vstop is mounted on the` fence 3, which, when not required, may be swung clear of the stock seat on the bed 2. The edge of the web 30 along theupper edge of the fence 3 is mach-ined to offer a vslightly dovetailed .cross section and on this dovetailed edge is slidably mounted a member 31. Between the upper and lower engaging portions of this member 31 is a slit 32 which renders it sufficiently resilient that the two parts may be clamped together on the web by a screw 33 rotatable in the upper kpart and threaded in the lower part, that is, in

. swung clear j vision by which the the part below the saw cut 32. On this member 31 is pivotally mounted at 311 the jaw of a stop member 35 which is L shaped that it may extend downk vthe acting facer ofthe fence 3 where it will form a stop to determine the length of any stock to be cut, or

when not required may be swung back clearv of the acting face, as shown in dot and dash lines in Fig. 3. .This stop may be moved to and secured at any desired position along the fence 3, which may be graduatedV if thought Y bed frame it may be introduced through the opening of one slideway frame to be4 acted on by the knife of the other. If the stock'to be lcut is shorter than the distance between the knives, each knife slideway 6 may `be clamped to an angle required and'one stop 35 may be set to determine the length to which one end of a number of pieces of the same length should be cut and the other to determine the cut of the other end to give the 'exact length required, one stop being while the other is in use. To enable a square shouldered tenon to be-cut on this device, blocks 36 may be furnished with it which are Vangled'to the angle of the knife edge, 37 to fit into apertures 39 provided in the fence. the lower corner of the stock willfrest. This ledge affords the stock a positive support and avoids the inaccuracy due to an injured or imperfect corner on the stock consequent on allowing the lower corner of the stock torest on the bed plate 2, as is thevcommon practice. Provision may be made at 40 for securing the device to a bench or trestle. Attention is directed to` thefollowing ad-Y vantageous features in the design ofthis de- The bed and fence being of ample length and provided wi-th an open frame knife slideway at each end, enablesthe stockto be amply supported in relation `to the plane of the cut; and with the use cfa knife at each end and with stops which'arereadily adjustable and susceptible-of being swung into or out of use without removal from the fence enables a quantity of short stock to: be duplicated without read'j-ustmen-t: 4Theproslideway maybe adjusted in relation to the cutting plane ofthe knife insures the .main-1y tenance of accurate workunder the-unavoidable wear outward 'from the pivots to which the pivots and the Yknife'framebearings are exposed, and ythe-zprovisionof fa'knife seat each block having a pin or pins- Each block has a ledge 38 onwhich plvots of each swingingv fil-s that is angled to afford the required face clearness of the blade is advantageous in the sharpening and renewal of the knife blades.

Having now particularly described my invention, I hereby declare that what I claim as new and desire to be protected in by Letters Patent, is:

l. In a wood trimmer having a fence and a knife slideway pivotally mounted in relation to one another, means for adjusting the aXis of the pivots in relation to the plane of movement of the knife.

2. In a Wood trimmer having a base plate and lengthwise fence and a knife frame slideway pivotally mounted thereto, means for adjusting the axis of the pivots of the slideway to the plane of movement of the knife frame.

3. A wood trimmer, comprising the oombination with a bed plate having a lengthwise fence plate integral with or secured to it, of an open slideway frame pivotally mounted at each end on an aXis which coincides with the plane of the fence, means for clamping each slideway frame at an angular adjustment, a knife frame having a knife blade secured to it said frame slidable in the slideway, and means for endwise reciprocating the knife frame.

4. A wood trimmer, comprising the combination with a bed plate having a fence plate at right angles to it, of an open frame pivotally mounted at each end to move on an axis which coincides with the plane of the fence, said frame having a grooved slideway, means for adjusting the axis of the pivots in relation to the plane of the slideway, means for clamping the slideway frame, and a lever operated knife frame movable in the slideway of each frame.

5. A wood trimmer, comprising the combination with a bed plate having a lengthwise fence plate at right angles to it, an open slideway frame pivotally mounted at each end to move on a vertical axis, a knife frame endwise movable in each slideway said knife frame having a seat for the knife blade the plane of which seat is angled slightly to the plane of movement of the knife frame, a knife blade of uniform thickness adjustably secured on the seat, and means for endwise moving each knife frame in its slideway.

6. In a wood trimmer, a bed plate having a lengthwise fence plate at right angles to it, said fence plate having a rearwardly projecting flange at its upper edge, a stop comprising an attaching clamp member slidably adjustably secured on said flange, an L- shaped stop member pivotally mounted on Copies of this patent may be obtained for `cent to an arc extension from the end v for securing said securing member and susceptible of being moved to project down the fence and lie against the front face of the same or of being swung up and back, all being arranged substantially as shown and described.

7. In a wood trimmer having a bed plate with a cutting knife slideway frame pivotally mounted at each end, means for securing each slideway frame in any desired angular adjustment, said means comprising a lever mounted between lugs downwardly projecting from the slideway frame adjaof the base plate the shorter end of said lever being shaped to engage the underside of the arc and the longer end of the lever produced under the end of a screw threaded through the slideway frame.

8. A wood trimmer, comprising the combination with a bed plate having a lengthwise fence plate at right angles to it said fence plate having pivotal bearings at each end for an open slideway frame and the end of the base plate at each end at an angle of forty-five degrees from the pivot bearings being dropped below the plane of the bed plate and therefrom produced in a segment of a circle struck from the aXis of "fthe pivot bearing, an open slideway frame having adjustable pivots to fit the bearings at the end of the fence, and rack teeth upwardly projecting from its lower side, means this slideway frame in any desired position of angular adjustment, said means comprising a lever pivotally connected to the underside of the slideway frame adjacent to the outside of the segmental projection of the base plate, said lever being formed at one end to engage the underside of the arc and a screw thread- 1ed vertically through the slideway frame the end of which screw bears on the other end of the clamping member, a knife frame endwise movable in grooves of the slideway said knife frame angled at its inner end and having a knife blade secured to its angled end, said knife frame having also rack teeth downwardly projecting from its upper outer side, a gear wheel the teeth of which mesh with those of the rack of the slideway frame and with those of the knife frame, a handle Vlever secured on the outer face of the gear wheel and a guard plate secured to the knife frame adjacent to its rack.

In testimony whereof I affix my signature in presence of two witnesses.

ARTHUR S. BILLINGS. Witnesses:

RowLAND BRITTAIN, MAY WHYTE.

five cents each, by addressing the Commissioner of Patents,

Washington, I). C. 

